Features: Long Standby: No disassembly cycle charging. Built-in lithium-ion high-capacity battery, long standby. The doorbell is powered by built-in large battery, no need to charge frequently; and the chime is of USB power supply, easy and convenient for use. Video Call: Easy to deal with visiting guests, when someone presses the doorbell, the doorbell will push notification to the phone, and the owner can enter the phone video conversation interface. Portable Installation: Can be pasted and perforated. Support adhesive backing, no need to punch holes, while supporting hole punch installation. No plugging, convenient and hassle-free. Capture Screen: Storage to the cloud, security protection drip. When a visitor presses the doorbell, it can capture the visitor's picture and save the record to the cloud, so that the cell phone APP can view the past pictures at any time, which is safer and more secure. Specification: Name: Smart Doorbell Material: ABS Plastic Electronic Components Color: White Day/ Night Mode Switch: Automatic Video Transmission Encryption: AES Radio Frequency Coding: EV1527 Infrared Lamp Control: Automatic, Adjustable Sensitivity Infrared Lamp Wave Length: 850nm Motion Detection: Automatic, Adjustable Aensitivity Connection Mode: 2.4G WiFi Package 1* Wireless Doorbell 1* Double-sided Tape